Stef~
Pretty sure it's not - but I always defer to Jersey boys on Barnegat matters.
As it happens, I helped a friend buy a Van Sant a few years ago at Tuckerton - and I did some restoration work on it:
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I see 2 important differences. Your vessel is sheer-sided - whereas the Van Sants are feather-edged. On your boat, the deck and bottom meet at a side; the deck joins the side at the gunwale and the bottom meets the side at the chine.
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The other difference is the sheer line. On your vessel, the sheer appears to be straight/flat fore and aft. On the Van Sant, the sheer sweeps up gently toward the bow. (In fact, the sheer on most traditional boats is usually lowest about a third of the way forward from the transom.)
There were (and still are) many makers of Barnegat Bay Sneakboxes - each with their own ideas about what is "best". The differences are often subtle.
Keep looking!
SJS